<template>
    <div>
        <el-breadcrumb>
            <el-breadcrumb-item :to="{path:'/home'}">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>商品分类</el-breadcrumb-item>
        <el-breadcrumb>
            <!-- 卡片视图 -->
            <el-card>
                <el-row>
                    <el-col>
                        <el-button type="primary" @click="showAddCateDialog">添加分类</el-button>
                    </el-col>
                </el-row>
                <!-- 表格 -->
                <tree-table class="treeTable" :data="catelist" :columns="columns" :selection-type="false" :expand-type="false" show-index index-text="#" border :show-row-hover="false">
                    <template slot="isok" slot-scope="scope">
                        <i class="el-icon-success" v-if="scope.row.cat_deleted === false" style="color:lightgreen"></i>
                        <i class="el-icon-error" v-else style="color:lightgreen"></i>
                    </template>
                    <template slot="order" slot-scope="scope">
                        <el-tag  size="mini" v-if="scope.row.cat_level ===0">一级</el-tag>
                        <el-tag type="success" size="mini" v-else-if="scope.row.cat_level ===1">二级</el-tag>
                        <el-tag type="warning" size="mini" v-else>三级</el-tag>
                    </template>

                    <template slot="opt">
                        <el-button type="primary" icon="el-icon-eidt">编辑</el-button>
                        <el-button type="danger" icon="el-icon-delete">删除</el-button>
                    </template>
                </tree-table>
                <!-- 分页 -->
                <el-pagination @size-change="handleSizeChange" @current-change="handleCurrentChange" :current-page="queryInfo.pagenum" :page-sizes="[3,5,10,15]" :page-size="queryInfo.pagesize">

                </el-pagination>
            </el-card>

            <!-- 添加分类对话框 -->
            <el-dialog title="添加分类" :visible.sync="addCatDialogVisible" width="50%" @close="addCatDialogClosed">
                <!-- 添加分类的表单 -->
                <el-form :model="addCateForm" :rules="addCateFormRules" ref="addCateFormRef" label-width="100px">
                    <el-form-item label="分类名称：" prop="cat_name">
                        <el-input v-model="addCateForm.cat_name"></el-input>
                    </el-form-item>
                    <el-form-item label="父级分类：">
                        <el-cascader expand-trigger="hover" :options="parentCateList" props="cascaderProps" v-model="selectedKeys" @change="parentCateChanged" clearable change-on-select></el-cascader>
                    </el-form-item>
                </el-form>
                <span slot="footer">
                    <el-button>取消</el-button>
                    <el-button @click="addCate">确定</el-button>
                </span>
            </el-dialog>
    </div>
</template>

<script>
export default {
    data(){
        return {
            //查询
            queryInfo:{
                type:3,
                pagenum:1,
                pagesize:5
            },
            //商品分类的数据列表
            catelist:[],
            //总条数
            total:0,
            columns:[
                {
                    label:'分类名称',
                    prop:'cat_name'
                },
                {
                    label:'是否有效',
                    type:'template',
                    template:'isok'
                },
                {
                    label:'排序',
                    type:'template',
                    template:'order'
                },
                {
                    label:'操作',
                    type:'template',
                    template:'opt'
                }
            ],
            addCatDialogVisible:false,
            //添加分类的表单对象
            addCateForm:{
                cat_name:'',
                cat_pid:0,
                cat_level:0

            },
            addCateFormRules:{
                cat_name:[
                    {required:true,message:'请你输入分类名称',tigger:'blur'}
                ]
            },
            //父级分类
            parentCateList:[],
            //指定级联选择器的配置
            cascaderProps:{
                value:'cat_id',
                label:'cat_name',
                children:children
            },
            //选中的父级分类
            selectedKeys:{

            }

        }
    },
    created(){
        this.getCateList();
    },
    methods:{
        //获取商品分类数据
      async getCateList(){
            const {data:res} = await this.$http.get('categories',{params:this.queryInfo})
            if(res.meta.code != '200'){
                return this.$message.error('获取商品分类数据失败')
            }
            console.log(res.data)
            this.catelist = res.data.result;
            this.total  =res.data.total;
        },
        //监听pagesize变化
        handleSizeChange(newSize){
            this.queryInfo.pagesize=newSize;
            this.getCateList();
        },
        handleCurrentChange(newPage){
            this.queryInfo.pagenum=newPage;
            this.getCateList();
        },
        showAddCateDialog(){
            //先获取父级
            this.getParentCateList()
            this.addCatDialogVisible = true;
        },
        //获取父级分类
        async getParentCateList(){
            const {data:res} = await this.$http.get('categories',{params:{type:2}})
            if(res.meta.code != '200'){
                return this.$message.error('你取数据失败')
            }
            console.log(res.data)
            this.parentCateList = res.data;
        },
        parentCateChanged(){
            console.log(this.selectedKeys)
            //选中了父级
            if(this.selectedKeys.length > 0){
                this.addCateForm.cat_pid = this.selectedKeys[this.selectedKeys.length - 1];
                this.addCateForm.cat_level = this.selectedKeys.length;
            }else{
                this.addCateForm.cat_pid = 0
                this.addCateForm.cat_level = 0
            }
        },
        //关闭对话框，重置表单
        addCatDialogClosed(){
            this.$refs.addCateFormRef.resetFields();
            this.selectedKeys = [];
            this.addCateForm.cat_level = 0
            this.addCateForm.cat_pid = 0
        },
        //添加分类
        addCate(){
            this.$refs.addCateFormRef.validate( async valid=>{
                if(!valid) return;
                const {data:res} = await this.$http.post('categories',this.addCateForm)
                if(res.meta.code != '201'){
                    return this.$message.error('添加分类失败')
                }
                this.message.success('添加成功')
                this.getCateList();
                this.addCatDialogVisible = false;
            })
        }
    }
}
</script>

<style lang="less" scoped>
.treeTable{
    margin-top: 15px;
}
.el-cascader{
    width:100px;
}
</style>